采用高效液相色谱-电喷雾串联质谱法测定猪肉中的全氟化合物(PFOS、PFOA)

采用HPLC-ESI-MS/MS联用技术,建立了分析检测猪肉肌肉组织中全氟辛烷磺酸(PFOS)和全氟辛酸(PFOA)的方法.本方法以Waters sunfire C 18柱为液相分离柱,以乙腈-5mmol/L乙酸铵溶液梯度洗脱溶液,PFOS和PFOA在10min内即能达到良好分离,定性定量离子对分别为499.0/79....     

全氟辛烷磺酰基化合物及全氟辛酸测试技术

为遏制全氟辛烷磺酰基化合物(PFOS)和全氟辛酸(PFOA)的全球性污染及对人类健康的危害,美、欧等国的有关部门及相关组织相继提出了禁止PFOS和PFOA生产及使用的规定.随着欧盟等对PFOS禁令的颁布和实施,PFOS和PFOA监测技术及分析方法研究倍受关注.然而,对于这些全氟化合物的定量测定,目前国际上尚无统一的标准...     

江西省畜禽产品中全氟辛酸和全氟辛烷磺酸污染情况调查与分析

为了探索江西省畜禽产品中全氟辛酸（perfluorooctanoic acid,PFOA）和全氟辛烷磺酸（perfluorooctanesulfonate,PFOS）的污染现状,采用超高效液相色谱-三重四极杆串联质谱对江西省5 个畜禽主产市市售猪、鸡、鸭各组织（n=260）样品中PFOS和PFOA的污染水平进行了分析。结果表明：以湿质量计算可知,鸡血中PFOA的污染水平最高,为0.52 ng/g,其次为猪肝（0.24 ng/g）,然后依次为鸡肝（0.14 ng/g）、鸭血（0.12 ng/g）、鸭肝（0.029 ng/g）,猪肉、鸡肉、鸭肉和猪血中均未检出PFOA的污染;PFOS仅在猪肝中检出,其均值为0.20 ng/g。对人体健康风险评价结果显示,江西省猪、鸡和鸭各组织中PFOA和PFOS不会对人体健康造成即时危害。     

纺织品中全氟辛烷磺酸及全氟辛酸的测定及其研究进展

全氟辛烷磺酸(PFOS)和全氟辛酸(PFOA)等化合物是应用广泛但对环境有持久污染的有机物.开展纺织品中PFOS和PFOA检测方法的研究是保护环境和人类健康,提升纺织产品质量的迫切要求.简述了PFOS和PFOA的各种检测方法和复杂样品的前处理技术,指出应研究有关纺织品中PFOS和PFOA快速、精确的测定方法,并尽快建立...     

皮革中全氟辛烷磺酸盐和全氟辛酸盐测定方法的优化

建立并优化了皮革样品中全氟辛烷磺酸盐(PFOS)和全氟辛酸盐(PFOA)的检测方法。在优化的提取温度和提取时间下,样品用甲基叔丁基醚–四丁基硫酸氢铵水溶液超声提取。提取液经浓缩、定容、过膜后,用超高效液相色谱–串联质谱(UPLC-MS/MS)检测。试验结果表明:在浓度范围0.5～20μg/L内PFOS和PFOA的标准曲线线性关系良好,方法的检测限均为0.25mg/kg,空白样品加标回收率分别在86%～96%和89%～103%之间,重复测量结果之间的相对标准偏差(RSD)小于10%。     

一次性纸杯中全氟辛酸 及全氟辛烷磺酸的膳食暴露研究

为了评估不同人群通过一次性纸杯摄入全氟辛酸(PFOA)及全氟辛烷磺酸(PFOS)的风险,采用超高效液相色谱串联质谱法测定一次性纸杯中PFOA及PFOS向不同食品中的迁移量,结合调查所得一次性纸杯的消费数据,利用点评估方法计算PFOA及PFOS通过一次性纸杯向不同人群的急性及慢性暴露量,并评估其急慢性暴露风险。结果表明,20种一次性纸杯中,PFOA及PFOS向食品中的迁移量分别为ND~23.70×10-3 ng/cm2、ND~4.10×10-3 ng/cm2;PFOA及PFOS的急性人群暴露量分别为45.67×10-3~168.36×10-3 ng/(kg·d)和7.91×10-3~29.14×10-3 ng/(kg·d),慢性人群暴露量分别为0.16×10-3~4.05×10-3 ng/(kg·d)和0.02×10-3~0.51×10-3 ng/(kg·d),均远低于欧盟推荐的每日摄入耐受量。人群通过一次性纸杯摄入PFOA及PFOS的风险处于可接受的水平。     

水产品中全氟辛酸和全氟辛烷磺酸检测技术 及污染现状

全氟辛酸(PFOA)和全氟辛烷磺酸(PFOS)是环境中广泛存在、较为典型的两种全氟化合物。针对水产品中PFOA和PFOS的检测技术和污染现状进行研究,进而研究其暴露途径、生物富集规律等内容,并基于此预测污染物环境分布、环境行为,以及相应地制定环境水和水产品质量安全标准,对于确保消费者食用安全具有重要意义。本文总结、分析了水产品中PFOA和PFOS的检测技术研究进展,及水环境和水产品中污染情况,对目前存在的问题及今后的研究方向进行了讨论和展望,以期为中国水产品中全氟化合物的监控和质量安全风险评估提供参考。     

全氟辛烷磺酸、全氟辛酸及其盐类检验技术的研究进展

全氟辛烷磺酸(PFOS)、全氟辛酸(PFOA)及其盐类物质具有生殖毒性、诱变毒性和发育毒性等多种毒性,也是目前最难降解的持久性有机污染物.全氟化合物独特的拒水拒油性,使其被广泛地应用于纺织、皮革、造纸等行业.PFOS和PFOA及其盐类物质通过食品包装材料,已经不知不觉进入我们的食品中,影响了食品安全,威胁着人们的身体健...     

液相色谱-串联质谱法测定皮革中PFOS及PFOA盐类

建立了皮革中全氟辛烷磺酸盐(PFOS)及全氟辛酸盐(PFOA)的萃取及液相色谱-串联质谱(LC-MS/MS)的检测方法.采用索氏抽提进行萃取,溶剂为甲醇,萃取液经弱阴离子固相萃取柱(Oasis WAX)净化处理后,采用负离子电喷雾电离、多级反应离子监测(MRM)模式进行LC-MS/MS检测.结果表明,PFOS和PFOA浓度在1 ～50 μg/L范围内,线性相关系良好,相关系数均大于0.995,在10 ～160 mg/kg范围内的添加水平回收率为80%～105%,相对标准偏差为6.3%～15.5%(n=6),定量检出限均为0.5 mg/kg.该方法可用于皮革中PFOS及PFOA盐类物质的测定.     

PFOS与PFOA的毒性效应及其在我国普通人群中的内暴露研究进展

全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）是应用广泛的人工合成化学物,在环境和人体内广泛存在,PFOS/PFOA毒性作用广泛且具有生物蓄积性,因为对人体健康有影响受到越来越多的关注。本文系统总结了PFOS/PFOA在哺乳动物体内的吸收、分布、代谢、排泄和毒性作用,以及目前国际上针对PFOS/PFOA提出的安全限量,并基于现有数据概述了我国普通人群PFOS/PFOA内暴露情况,以期为PFOS/PFOA的风险评估及风险管理提供科学基础。     

Monitoring of perfluorinated compounds in edible fish from the Mediterranean Sea

Perfluorooctanoic acid (PFOA) and perfluorooctane sulphonate (PFOS) are environmental contaminants belonging to a chemical group known as perfluorinated compounds (PCFs). The United States Environmental Protection Agency (US EPA) considers both compounds to be carcinogenic. The goal of the present study was to evaluate the contamination levels of PFOS and PFOA in edible fish of the Mediterranean Sea. Twenty six fish muscles, 17 fish livers, five series of cephalopods (each composed of ten specimens) and thirteen series of bivalves (each composed of about 50 specimens) were used for the investigation. A fast sample treatment, followed by an LC–ESI–MS/MS method is described for the identification, and quantification of PFOA and PFOS in fish. The method was in-house-validated through the determination of precision, accuracy, specificity, calibration curve, decision limit (CCα), and detection capability (CCβ). The results showed PFOA and PFOS levels in fishes and molluscs lower than those reported for analogue matrices in different geographic areas. Therefore, our biomonitoring results did not show that the Mediterranean Sea had any particularly alarming pollution by PFCs, although it is located in a semi-closed basin with scarce water change. Nonetheless, a worrying element is that a few fish showed extremely high contamination by PFOA and PFOS. This finding needs further clarification in order to assess whether such unusual contamination is linked to “dot-like” pollutant release, which could explain the anomaly.     

液相色谱串联质谱法测定纺织品中PFOS和PFOA

针对国际对纺织品中全氟辛磺酸(PFOS)和全氟辛酸(PFOA)的限量要求,采用ASE-300快速溶剂萃取仪提取样品中PFOS和PFOA,经浓缩、净化、过膜、定容后用液相色谱串联质谱法测定,外标法定量。采用选择离子检测进行阳性确证,建立纺织品中PFOS和PFOA的检测方法。该方法的最低检出限、线性范围和方法回收率对PFOS为1.0μg/kg、3.0~300μg/kg和82.35%~105.60%;对PFOA为0.5μg/kg、1.5~200μg/kg和85.17%~107.78%。     

Analysis of selected perfluoroalkyl substances (PFASs) in beer to evaluate the effect of beer consumption on human PFAS exposure: a pilot study

This report describes the development of a method for the determination and quantification of perfluoroalkyl substances (PFASs) in beer. A total of 93 beer samples were analyzed for the presence of PFASs by means of liquid chromatography tandem mass spectrometry. The results of this study have made it possible to calculate possible PFAS uptake via beer as well as the potential PFAS-related health risk as a result of beer consumption with regard to the tolerable daily intake (TDI) of perfluoro-n-octanoic acid (PFOA) (1,500 ng/kg bodyweight and day) and perfluorooctane sulfonate (PFOS) (150 ng/kg bodyweight and day). PFOS concentrations above the limit of quantification were detected in 50 % of the samples. The highest PFOS concentration detected in any of the beers was 18.4 ng/L, and the highest PFOA concentration was 56.9 ng/L. The calculated maximum uptake of both substances for which a TDI level exists were 2.44 ng/kg bodyweight/day for PFOA and 0.79 ng/kg bodyweight/day for PFOS assuming that an adult consumed his/her total daily liquid uptake exclusively by drinking 3 L of beer, equivalent to the maximum measured concentration (worst-case scenario). In regard to the model calculations made here, the maximum uptake of PFOA and PFOS via consumption of beer can be considered negligible at 0.85 % of the concentration that would be required to reach the TDI for PFOS and 0.16 % for PFOA.     

Analysis of Trace Metals and Perfluorinated Compounds in 43 Representative Tea Products from South China

Six trace metals (Cd, Pb, Cr, Cu, Zn, and Mn) and 2 perfluorinated compounds (PFCs), perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), were analyzed in 43 representative tea products (including 18 green, 12 Oolong, and 13 black teas) from 7 main tea production provinces in China, using the atomic absorption spectrophotometer for trace metals analysis and HPLC‐MS/MS for PFOS and PFOA analysis. The average contents of the 3 essential metals Mn, Cu, and Zn ions in the tea samples were 629.74, 17.75, and 37.38 mg/kg, whereas 3 toxic metals Cd, Cr, and Pb were 0.65, 1.02, and 1.92 mg/kg, respectively. The contents of heavy metals in the 3 types of tea were in the order of black tea > Oolong tea > green tea. Both PFOS and PFOA contents were low and PFOA content was higher than PFOS in the tea samples. The highest concentration of PFOA was 0.25 ng/g dry weight found in a Hunan green tea. The Principal component analysis was performed with the trace metals and PFCs to analyze the relationships of these indices. The results showed that black teas had higher trace metals and PFCs than green and Oolong teas, and the teas from Hunan and Zhejiang provinces had higher Pb and Cr than others.     

Temporal trends of PFOS and PFOA in guillemot eggs from the Baltic Sea, 1968--2003

Perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) have recently been identified as ubiquitous environmental contaminants. Although they have been produced for 50 years, little is known about when they first appeared in the environment and how their concentrations have changed over time, particularly in response to the phase-out of PFOS, which began in 2000. In this study temporal trends in the concentrations of PFOS and PFOA in the Baltic Sea marine environmentwere measured using archived guillemot eggs. Samples collected from Stora Karls? (Sweden) between 1968 and 2003 were received from an environmental specimen bank and concentrations of PFOS and PFOA were analyzed using HPLC coupled to ESI-MS/MS. PFOA was not detected in any of the samples (LOD 3 ng/g), but there was an almost 30-fold increase in PFOS concentrations in the guillemot eggs during the time period, from 25 ng/g in 1968 to 614 ng/g in 2003 (wet weight). Regression analysis indicated a significant trend, increasing on average between 7 and 11% per year. A sharp peak in PFOS concentrations was observed in 1997 followed by decreasing levels up to 2002, but this cannot be linked to the PFOS phase-out, which occurred at the end of this period.     

Perfluorinated compounds in house dust from Ohio and North Carolina, USA

The perfluoroalkyl acids (PFAAs), including perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), have come under increasing scrutiny due to their persistence, global distribution, and toxicity. Given that their human exposure routes remain poorly characterized, the potential role of house dust needs to be more completely evaluated. In this study, new methods for the analysis of 10 PFAAs and three fluorinated telomer alcohols (FTOHs) were developed for dust samples collected from homes (n = 102) and day care centers (n = 10) in Ohio and North Carolina in 2000-2001. FTOHs were measured by GC/ MS and PFAAs were analyzed by LC-MS/MS. PFOS and PFOA were the most prominent compounds detected, occurring in over 95% of the samples at median concentrations of 201 and 142 ng/g of dust, respectively. Maximal concentrations of PFOS were 12 100 ng/g (95th percentile, 2240 ng/g), PFOA 1960 ng/g (95th percentile, 1200 ng/g), and perfluorohexanesulfonate (PFHS) 35 700 ng/g (95th percentile, 2300 ng/g). The 8:2 FTOH, which is volatile and can degrade to PFOA, had a maximum concentration of 1660 ng/g dust (95th percentile, 669 ng/g). These results indicate that perfluorinated compounds are present in house dust at levels that may represent an important pathway for human exposure.